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31#include <linux/kernel.h>
32#include <linux/sched.h>
33#include <linux/slab.h>
34#include <linux/string.h>
35#include <linux/errno.h>
36#include <linux/audit.h>
37#include "security.h"
38
39#include "policydb.h"
40#include "conditional.h"
41#include "mls.h"
42#include "services.h"
43
44#define _DEBUG_HASHES
45
46#ifdef DEBUG_HASHES
47static const char *symtab_name[SYM_NUM] = {
48 "common prefixes",
49 "classes",
50 "roles",
51 "types",
52 "users",
53 "bools",
54 "levels",
55 "categories",
56};
57#endif
58
59static unsigned int symtab_sizes[SYM_NUM] = {
60 2,
61 32,
62 16,
63 512,
64 128,
65 16,
66 16,
67 16,
68};
69
70struct policydb_compat_info {
71 int version;
72 int sym_num;
73 int ocon_num;
74};
75
76
77static struct policydb_compat_info policydb_compat[] = {
78 {
79 .version = POLICYDB_VERSION_BASE,
80 .sym_num = SYM_NUM - 3,
81 .ocon_num = OCON_NUM - 3,
82 },
83 {
84 .version = POLICYDB_VERSION_BOOL,
85 .sym_num = SYM_NUM - 2,
86 .ocon_num = OCON_NUM - 3,
87 },
88 {
89 .version = POLICYDB_VERSION_IPV6,
90 .sym_num = SYM_NUM - 2,
91 .ocon_num = OCON_NUM - 2,
92 },
93 {
94 .version = POLICYDB_VERSION_NLCLASS,
95 .sym_num = SYM_NUM - 2,
96 .ocon_num = OCON_NUM - 2,
97 },
98 {
99 .version = POLICYDB_VERSION_MLS,
100 .sym_num = SYM_NUM,
101 .ocon_num = OCON_NUM - 2,
102 },
103 {
104 .version = POLICYDB_VERSION_AVTAB,
105 .sym_num = SYM_NUM,
106 .ocon_num = OCON_NUM - 2,
107 },
108 {
109 .version = POLICYDB_VERSION_RANGETRANS,
110 .sym_num = SYM_NUM,
111 .ocon_num = OCON_NUM - 2,
112 },
113 {
114 .version = POLICYDB_VERSION_POLCAP,
115 .sym_num = SYM_NUM,
116 .ocon_num = OCON_NUM - 2,
117 },
118 {
119 .version = POLICYDB_VERSION_PERMISSIVE,
120 .sym_num = SYM_NUM,
121 .ocon_num = OCON_NUM - 2,
122 },
123 {
124 .version = POLICYDB_VERSION_BOUNDARY,
125 .sym_num = SYM_NUM,
126 .ocon_num = OCON_NUM - 2,
127 },
128 {
129 .version = POLICYDB_VERSION_FILENAME_TRANS,
130 .sym_num = SYM_NUM,
131 .ocon_num = OCON_NUM - 2,
132 },
133 {
134 .version = POLICYDB_VERSION_ROLETRANS,
135 .sym_num = SYM_NUM,
136 .ocon_num = OCON_NUM - 2,
137 },
138 {
139 .version = POLICYDB_VERSION_NEW_OBJECT_DEFAULTS,
140 .sym_num = SYM_NUM,
141 .ocon_num = OCON_NUM - 2,
142 },
143 {
144 .version = POLICYDB_VERSION_DEFAULT_TYPE,
145 .sym_num = SYM_NUM,
146 .ocon_num = OCON_NUM - 2,
147 },
148 {
149 .version = POLICYDB_VERSION_CONSTRAINT_NAMES,
150 .sym_num = SYM_NUM,
151 .ocon_num = OCON_NUM - 2,
152 },
153 {
154 .version = POLICYDB_VERSION_XPERMS_IOCTL,
155 .sym_num = SYM_NUM,
156 .ocon_num = OCON_NUM - 2,
157 },
158 {
159 .version = POLICYDB_VERSION_INFINIBAND,
160 .sym_num = SYM_NUM,
161 .ocon_num = OCON_NUM,
162 },
163};
164
165static struct policydb_compat_info *policydb_lookup_compat(int version)
166{
167 int i;
168 struct policydb_compat_info *info = NULL;
169
170 for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
171 if (policydb_compat[i].version == version) {
172 info = &policydb_compat[i];
173 break;
174 }
175 }
176 return info;
177}
178
179
180
181
182static int roles_init(struct policydb *p)
183{
184 char *key = NULL;
185 int rc;
186 struct role_datum *role;
187
188 role = kzalloc(sizeof(*role), GFP_KERNEL);
189 if (!role)
190 return -ENOMEM;
191
192 rc = -EINVAL;
193 role->value = ++p->p_roles.nprim;
194 if (role->value != OBJECT_R_VAL)
195 goto out;
196
197 rc = -ENOMEM;
198 key = kstrdup(OBJECT_R, GFP_KERNEL);
199 if (!key)
200 goto out;
201
202 rc = hashtab_insert(p->p_roles.table, key, role);
203 if (rc)
204 goto out;
205
206 return 0;
207out:
208 kfree(key);
209 kfree(role);
210 return rc;
211}
212
213static u32 filenametr_hash(struct hashtab *h, const void *k)
214{
215 const struct filename_trans *ft = k;
216 unsigned long hash;
217 unsigned int byte_num;
218 unsigned char focus;
219
220 hash = ft->stype ^ ft->ttype ^ ft->tclass;
221
222 byte_num = 0;
223 while ((focus = ft->name[byte_num++]))
224 hash = partial_name_hash(focus, hash);
225 return hash & (h->size - 1);
226}
227
228static int filenametr_cmp(struct hashtab *h, const void *k1, const void *k2)
229{
230 const struct filename_trans *ft1 = k1;
231 const struct filename_trans *ft2 = k2;
232 int v;
233
234 v = ft1->stype - ft2->stype;
235 if (v)
236 return v;
237
238 v = ft1->ttype - ft2->ttype;
239 if (v)
240 return v;
241
242 v = ft1->tclass - ft2->tclass;
243 if (v)
244 return v;
245
246 return strcmp(ft1->name, ft2->name);
247
248}
249
250static u32 rangetr_hash(struct hashtab *h, const void *k)
251{
252 const struct range_trans *key = k;
253 return (key->source_type + (key->target_type << 3) +
254 (key->target_class << 5)) & (h->size - 1);
255}
256
257static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2)
258{
259 const struct range_trans *key1 = k1, *key2 = k2;
260 int v;
261
262 v = key1->source_type - key2->source_type;
263 if (v)
264 return v;
265
266 v = key1->target_type - key2->target_type;
267 if (v)
268 return v;
269
270 v = key1->target_class - key2->target_class;
271
272 return v;
273}
274
275
276
277
278static int policydb_init(struct policydb *p)
279{
280 int i, rc;
281
282 memset(p, 0, sizeof(*p));
283
284 for (i = 0; i < SYM_NUM; i++) {
285 rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
286 if (rc)
287 goto out;
288 }
289
290 rc = avtab_init(&p->te_avtab);
291 if (rc)
292 goto out;
293
294 rc = roles_init(p);
295 if (rc)
296 goto out;
297
298 rc = cond_policydb_init(p);
299 if (rc)
300 goto out;
301
302 p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp, (1 << 10));
303 if (!p->filename_trans) {
304 rc = -ENOMEM;
305 goto out;
306 }
307
308 p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256);
309 if (!p->range_tr) {
310 rc = -ENOMEM;
311 goto out;
312 }
313
314 ebitmap_init(&p->filename_trans_ttypes);
315 ebitmap_init(&p->policycaps);
316 ebitmap_init(&p->permissive_map);
317
318 return 0;
319out:
320 hashtab_destroy(p->filename_trans);
321 hashtab_destroy(p->range_tr);
322 for (i = 0; i < SYM_NUM; i++)
323 hashtab_destroy(p->symtab[i].table);
324 return rc;
325}
326
327
328
329
330
331
332
333
334
335
336
337static int common_index(void *key, void *datum, void *datap)
338{
339 struct policydb *p;
340 struct common_datum *comdatum;
341
342 comdatum = datum;
343 p = datap;
344 if (!comdatum->value || comdatum->value > p->p_commons.nprim)
345 return -EINVAL;
346
347 p->sym_val_to_name[SYM_COMMONS][comdatum->value - 1] = key;
348
349 return 0;
350}
351
352static int class_index(void *key, void *datum, void *datap)
353{
354 struct policydb *p;
355 struct class_datum *cladatum;
356
357 cladatum = datum;
358 p = datap;
359 if (!cladatum->value || cladatum->value > p->p_classes.nprim)
360 return -EINVAL;
361
362 p->sym_val_to_name[SYM_CLASSES][cladatum->value - 1] = key;
363 p->class_val_to_struct[cladatum->value - 1] = cladatum;
364 return 0;
365}
366
367static int role_index(void *key, void *datum, void *datap)
368{
369 struct policydb *p;
370 struct role_datum *role;
371
372 role = datum;
373 p = datap;
374 if (!role->value
375 || role->value > p->p_roles.nprim
376 || role->bounds > p->p_roles.nprim)
377 return -EINVAL;
378
379 p->sym_val_to_name[SYM_ROLES][role->value - 1] = key;
380 p->role_val_to_struct[role->value - 1] = role;
381 return 0;
382}
383
384static int type_index(void *key, void *datum, void *datap)
385{
386 struct policydb *p;
387 struct type_datum *typdatum;
388
389 typdatum = datum;
390 p = datap;
391
392 if (typdatum->primary) {
393 if (!typdatum->value
394 || typdatum->value > p->p_types.nprim
395 || typdatum->bounds > p->p_types.nprim)
396 return -EINVAL;
397 p->sym_val_to_name[SYM_TYPES][typdatum->value - 1] = key;
398 p->type_val_to_struct_array[typdatum->value - 1] = typdatum;
399 }
400
401 return 0;
402}
403
404static int user_index(void *key, void *datum, void *datap)
405{
406 struct policydb *p;
407 struct user_datum *usrdatum;
408
409 usrdatum = datum;
410 p = datap;
411 if (!usrdatum->value
412 || usrdatum->value > p->p_users.nprim
413 || usrdatum->bounds > p->p_users.nprim)
414 return -EINVAL;
415
416 p->sym_val_to_name[SYM_USERS][usrdatum->value - 1] = key;
417 p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
418 return 0;
419}
420
421static int sens_index(void *key, void *datum, void *datap)
422{
423 struct policydb *p;
424 struct level_datum *levdatum;
425
426 levdatum = datum;
427 p = datap;
428
429 if (!levdatum->isalias) {
430 if (!levdatum->level->sens ||
431 levdatum->level->sens > p->p_levels.nprim)
432 return -EINVAL;
433
434 p->sym_val_to_name[SYM_LEVELS][levdatum->level->sens - 1] = key;
435 }
436
437 return 0;
438}
439
440static int cat_index(void *key, void *datum, void *datap)
441{
442 struct policydb *p;
443 struct cat_datum *catdatum;
444
445 catdatum = datum;
446 p = datap;
447
448 if (!catdatum->isalias) {
449 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
450 return -EINVAL;
451
452 p->sym_val_to_name[SYM_CATS][catdatum->value - 1] = key;
453 }
454
455 return 0;
456}
457
458static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
459{
460 common_index,
461 class_index,
462 role_index,
463 type_index,
464 user_index,
465 cond_index_bool,
466 sens_index,
467 cat_index,
468};
469
470#ifdef DEBUG_HASHES
471static void hash_eval(struct hashtab *h, const char *hash_name)
472{
473 struct hashtab_info info;
474
475 hashtab_stat(h, &info);
476 pr_debug("SELinux: %s: %d entries and %d/%d buckets used, "
477 "longest chain length %d\n", hash_name, h->nel,
478 info.slots_used, h->size, info.max_chain_len);
479}
480
481static void symtab_hash_eval(struct symtab *s)
482{
483 int i;
484
485 for (i = 0; i < SYM_NUM; i++)
486 hash_eval(s[i].table, symtab_name[i]);
487}
488
489#else
490static inline void hash_eval(struct hashtab *h, char *hash_name)
491{
492}
493#endif
494
495
496
497
498
499
500
501static int policydb_index(struct policydb *p)
502{
503 int i, rc;
504
505 if (p->mls_enabled)
506 pr_debug("SELinux: %d users, %d roles, %d types, %d bools, %d sens, %d cats\n",
507 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
508 p->p_bools.nprim, p->p_levels.nprim, p->p_cats.nprim);
509 else
510 pr_debug("SELinux: %d users, %d roles, %d types, %d bools\n",
511 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
512 p->p_bools.nprim);
513
514 pr_debug("SELinux: %d classes, %d rules\n",
515 p->p_classes.nprim, p->te_avtab.nel);
516
517#ifdef DEBUG_HASHES
518 avtab_hash_eval(&p->te_avtab, "rules");
519 symtab_hash_eval(p->symtab);
520#endif
521
522 p->class_val_to_struct = kcalloc(p->p_classes.nprim,
523 sizeof(*p->class_val_to_struct),
524 GFP_KERNEL);
525 if (!p->class_val_to_struct)
526 return -ENOMEM;
527
528 p->role_val_to_struct = kcalloc(p->p_roles.nprim,
529 sizeof(*p->role_val_to_struct),
530 GFP_KERNEL);
531 if (!p->role_val_to_struct)
532 return -ENOMEM;
533
534 p->user_val_to_struct = kcalloc(p->p_users.nprim,
535 sizeof(*p->user_val_to_struct),
536 GFP_KERNEL);
537 if (!p->user_val_to_struct)
538 return -ENOMEM;
539
540 p->type_val_to_struct_array = kvcalloc(p->p_types.nprim,
541 sizeof(*p->type_val_to_struct_array),
542 GFP_KERNEL);
543 if (!p->type_val_to_struct_array)
544 return -ENOMEM;
545
546 rc = cond_init_bool_indexes(p);
547 if (rc)
548 goto out;
549
550 for (i = 0; i < SYM_NUM; i++) {
551 p->sym_val_to_name[i] = kvcalloc(p->symtab[i].nprim,
552 sizeof(char *),
553 GFP_KERNEL);
554 if (!p->sym_val_to_name[i])
555 return -ENOMEM;
556
557 rc = hashtab_map(p->symtab[i].table, index_f[i], p);
558 if (rc)
559 goto out;
560 }
561 rc = 0;
562out:
563 return rc;
564}
565
566
567
568
569
570
571
572static int perm_destroy(void *key, void *datum, void *p)
573{
574 kfree(key);
575 kfree(datum);
576 return 0;
577}
578
579static int common_destroy(void *key, void *datum, void *p)
580{
581 struct common_datum *comdatum;
582
583 kfree(key);
584 if (datum) {
585 comdatum = datum;
586 hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
587 hashtab_destroy(comdatum->permissions.table);
588 }
589 kfree(datum);
590 return 0;
591}
592
593static void constraint_expr_destroy(struct constraint_expr *expr)
594{
595 if (expr) {
596 ebitmap_destroy(&expr->names);
597 if (expr->type_names) {
598 ebitmap_destroy(&expr->type_names->types);
599 ebitmap_destroy(&expr->type_names->negset);
600 kfree(expr->type_names);
601 }
602 kfree(expr);
603 }
604}
605
606static int cls_destroy(void *key, void *datum, void *p)
607{
608 struct class_datum *cladatum;
609 struct constraint_node *constraint, *ctemp;
610 struct constraint_expr *e, *etmp;
611
612 kfree(key);
613 if (datum) {
614 cladatum = datum;
615 hashtab_map(cladatum->permissions.table, perm_destroy, NULL);
616 hashtab_destroy(cladatum->permissions.table);
617 constraint = cladatum->constraints;
618 while (constraint) {
619 e = constraint->expr;
620 while (e) {
621 etmp = e;
622 e = e->next;
623 constraint_expr_destroy(etmp);
624 }
625 ctemp = constraint;
626 constraint = constraint->next;
627 kfree(ctemp);
628 }
629
630 constraint = cladatum->validatetrans;
631 while (constraint) {
632 e = constraint->expr;
633 while (e) {
634 etmp = e;
635 e = e->next;
636 constraint_expr_destroy(etmp);
637 }
638 ctemp = constraint;
639 constraint = constraint->next;
640 kfree(ctemp);
641 }
642 kfree(cladatum->comkey);
643 }
644 kfree(datum);
645 return 0;
646}
647
648static int role_destroy(void *key, void *datum, void *p)
649{
650 struct role_datum *role;
651
652 kfree(key);
653 if (datum) {
654 role = datum;
655 ebitmap_destroy(&role->dominates);
656 ebitmap_destroy(&role->types);
657 }
658 kfree(datum);
659 return 0;
660}
661
662static int type_destroy(void *key, void *datum, void *p)
663{
664 kfree(key);
665 kfree(datum);
666 return 0;
667}
668
669static int user_destroy(void *key, void *datum, void *p)
670{
671 struct user_datum *usrdatum;
672
673 kfree(key);
674 if (datum) {
675 usrdatum = datum;
676 ebitmap_destroy(&usrdatum->roles);
677 ebitmap_destroy(&usrdatum->range.level[0].cat);
678 ebitmap_destroy(&usrdatum->range.level[1].cat);
679 ebitmap_destroy(&usrdatum->dfltlevel.cat);
680 }
681 kfree(datum);
682 return 0;
683}
684
685static int sens_destroy(void *key, void *datum, void *p)
686{
687 struct level_datum *levdatum;
688
689 kfree(key);
690 if (datum) {
691 levdatum = datum;
692 if (levdatum->level)
693 ebitmap_destroy(&levdatum->level->cat);
694 kfree(levdatum->level);
695 }
696 kfree(datum);
697 return 0;
698}
699
700static int cat_destroy(void *key, void *datum, void *p)
701{
702 kfree(key);
703 kfree(datum);
704 return 0;
705}
706
707static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
708{
709 common_destroy,
710 cls_destroy,
711 role_destroy,
712 type_destroy,
713 user_destroy,
714 cond_destroy_bool,
715 sens_destroy,
716 cat_destroy,
717};
718
719static int filenametr_destroy(void *key, void *datum, void *p)
720{
721 struct filename_trans *ft = key;
722 kfree(ft->name);
723 kfree(key);
724 kfree(datum);
725 cond_resched();
726 return 0;
727}
728
729static int range_tr_destroy(void *key, void *datum, void *p)
730{
731 struct mls_range *rt = datum;
732 kfree(key);
733 ebitmap_destroy(&rt->level[0].cat);
734 ebitmap_destroy(&rt->level[1].cat);
735 kfree(datum);
736 cond_resched();
737 return 0;
738}
739
740static void ocontext_destroy(struct ocontext *c, int i)
741{
742 if (!c)
743 return;
744
745 context_destroy(&c->context[0]);
746 context_destroy(&c->context[1]);
747 if (i == OCON_ISID || i == OCON_FS ||
748 i == OCON_NETIF || i == OCON_FSUSE)
749 kfree(c->u.name);
750 kfree(c);
751}
752
753
754
755
756void policydb_destroy(struct policydb *p)
757{
758 struct ocontext *c, *ctmp;
759 struct genfs *g, *gtmp;
760 int i;
761 struct role_allow *ra, *lra = NULL;
762 struct role_trans *tr, *ltr = NULL;
763
764 for (i = 0; i < SYM_NUM; i++) {
765 cond_resched();
766 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
767 hashtab_destroy(p->symtab[i].table);
768 }
769
770 for (i = 0; i < SYM_NUM; i++)
771 kvfree(p->sym_val_to_name[i]);
772
773 kfree(p->class_val_to_struct);
774 kfree(p->role_val_to_struct);
775 kfree(p->user_val_to_struct);
776 kvfree(p->type_val_to_struct_array);
777
778 avtab_destroy(&p->te_avtab);
779
780 for (i = 0; i < OCON_NUM; i++) {
781 cond_resched();
782 c = p->ocontexts[i];
783 while (c) {
784 ctmp = c;
785 c = c->next;
786 ocontext_destroy(ctmp, i);
787 }
788 p->ocontexts[i] = NULL;
789 }
790
791 g = p->genfs;
792 while (g) {
793 cond_resched();
794 kfree(g->fstype);
795 c = g->head;
796 while (c) {
797 ctmp = c;
798 c = c->next;
799 ocontext_destroy(ctmp, OCON_FSUSE);
800 }
801 gtmp = g;
802 g = g->next;
803 kfree(gtmp);
804 }
805 p->genfs = NULL;
806
807 cond_policydb_destroy(p);
808
809 for (tr = p->role_tr; tr; tr = tr->next) {
810 cond_resched();
811 kfree(ltr);
812 ltr = tr;
813 }
814 kfree(ltr);
815
816 for (ra = p->role_allow; ra; ra = ra->next) {
817 cond_resched();
818 kfree(lra);
819 lra = ra;
820 }
821 kfree(lra);
822
823 hashtab_map(p->filename_trans, filenametr_destroy, NULL);
824 hashtab_destroy(p->filename_trans);
825
826 hashtab_map(p->range_tr, range_tr_destroy, NULL);
827 hashtab_destroy(p->range_tr);
828
829 if (p->type_attr_map_array) {
830 for (i = 0; i < p->p_types.nprim; i++)
831 ebitmap_destroy(&p->type_attr_map_array[i]);
832 kvfree(p->type_attr_map_array);
833 }
834
835 ebitmap_destroy(&p->filename_trans_ttypes);
836 ebitmap_destroy(&p->policycaps);
837 ebitmap_destroy(&p->permissive_map);
838}
839
840
841
842
843
844int policydb_load_isids(struct policydb *p, struct sidtab *s)
845{
846 struct ocontext *head, *c;
847 int rc;
848
849 rc = sidtab_init(s);
850 if (rc) {
851 pr_err("SELinux: out of memory on SID table init\n");
852 goto out;
853 }
854
855 head = p->ocontexts[OCON_ISID];
856 for (c = head; c; c = c->next) {
857 rc = -EINVAL;
858 if (!c->context[0].user) {
859 pr_err("SELinux: SID %s was never defined.\n",
860 c->u.name);
861 sidtab_destroy(s);
862 goto out;
863 }
864 if (c->sid[0] == SECSID_NULL || c->sid[0] > SECINITSID_NUM) {
865 pr_err("SELinux: Initial SID %s out of range.\n",
866 c->u.name);
867 sidtab_destroy(s);
868 goto out;
869 }
870
871 rc = sidtab_set_initial(s, c->sid[0], &c->context[0]);
872 if (rc) {
873 pr_err("SELinux: unable to load initial SID %s.\n",
874 c->u.name);
875 sidtab_destroy(s);
876 goto out;
877 }
878 }
879 rc = 0;
880out:
881 return rc;
882}
883
884int policydb_class_isvalid(struct policydb *p, unsigned int class)
885{
886 if (!class || class > p->p_classes.nprim)
887 return 0;
888 return 1;
889}
890
891int policydb_role_isvalid(struct policydb *p, unsigned int role)
892{
893 if (!role || role > p->p_roles.nprim)
894 return 0;
895 return 1;
896}
897
898int policydb_type_isvalid(struct policydb *p, unsigned int type)
899{
900 if (!type || type > p->p_types.nprim)
901 return 0;
902 return 1;
903}
904
905
906
907
908
909int policydb_context_isvalid(struct policydb *p, struct context *c)
910{
911 struct role_datum *role;
912 struct user_datum *usrdatum;
913
914 if (!c->role || c->role > p->p_roles.nprim)
915 return 0;
916
917 if (!c->user || c->user > p->p_users.nprim)
918 return 0;
919
920 if (!c->type || c->type > p->p_types.nprim)
921 return 0;
922
923 if (c->role != OBJECT_R_VAL) {
924
925
926
927 role = p->role_val_to_struct[c->role - 1];
928 if (!role || !ebitmap_get_bit(&role->types, c->type - 1))
929
930 return 0;
931
932
933
934
935 usrdatum = p->user_val_to_struct[c->user - 1];
936 if (!usrdatum)
937 return 0;
938
939 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
940
941 return 0;
942 }
943
944 if (!mls_context_isvalid(p, c))
945 return 0;
946
947 return 1;
948}
949
950
951
952
953
954static int mls_read_range_helper(struct mls_range *r, void *fp)
955{
956 __le32 buf[2];
957 u32 items;
958 int rc;
959
960 rc = next_entry(buf, fp, sizeof(u32));
961 if (rc)
962 goto out;
963
964 rc = -EINVAL;
965 items = le32_to_cpu(buf[0]);
966 if (items > ARRAY_SIZE(buf)) {
967 pr_err("SELinux: mls: range overflow\n");
968 goto out;
969 }
970
971 rc = next_entry(buf, fp, sizeof(u32) * items);
972 if (rc) {
973 pr_err("SELinux: mls: truncated range\n");
974 goto out;
975 }
976
977 r->level[0].sens = le32_to_cpu(buf[0]);
978 if (items > 1)
979 r->level[1].sens = le32_to_cpu(buf[1]);
980 else
981 r->level[1].sens = r->level[0].sens;
982
983 rc = ebitmap_read(&r->level[0].cat, fp);
984 if (rc) {
985 pr_err("SELinux: mls: error reading low categories\n");
986 goto out;
987 }
988 if (items > 1) {
989 rc = ebitmap_read(&r->level[1].cat, fp);
990 if (rc) {
991 pr_err("SELinux: mls: error reading high categories\n");
992 goto bad_high;
993 }
994 } else {
995 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
996 if (rc) {
997 pr_err("SELinux: mls: out of memory\n");
998 goto bad_high;
999 }
1000 }
1001
1002 return 0;
1003bad_high:
1004 ebitmap_destroy(&r->level[0].cat);
1005out:
1006 return rc;
1007}
1008
1009
1010
1011
1012
1013static int context_read_and_validate(struct context *c,
1014 struct policydb *p,
1015 void *fp)
1016{
1017 __le32 buf[3];
1018 int rc;
1019
1020 rc = next_entry(buf, fp, sizeof buf);
1021 if (rc) {
1022 pr_err("SELinux: context truncated\n");
1023 goto out;
1024 }
1025 c->user = le32_to_cpu(buf[0]);
1026 c->role = le32_to_cpu(buf[1]);
1027 c->type = le32_to_cpu(buf[2]);
1028 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1029 rc = mls_read_range_helper(&c->range, fp);
1030 if (rc) {
1031 pr_err("SELinux: error reading MLS range of context\n");
1032 goto out;
1033 }
1034 }
1035
1036 rc = -EINVAL;
1037 if (!policydb_context_isvalid(p, c)) {
1038 pr_err("SELinux: invalid security context\n");
1039 context_destroy(c);
1040 goto out;
1041 }
1042 rc = 0;
1043out:
1044 return rc;
1045}
1046
1047
1048
1049
1050
1051
1052
1053static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
1054{
1055 int rc;
1056 char *str;
1057
1058 if ((len == 0) || (len == (u32)-1))
1059 return -EINVAL;
1060
1061 str = kmalloc(len + 1, flags | __GFP_NOWARN);
1062 if (!str)
1063 return -ENOMEM;
1064
1065
1066 *strp = str;
1067
1068 rc = next_entry(str, fp, len);
1069 if (rc)
1070 return rc;
1071
1072 str[len] = '\0';
1073 return 0;
1074}
1075
1076static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
1077{
1078 char *key = NULL;
1079 struct perm_datum *perdatum;
1080 int rc;
1081 __le32 buf[2];
1082 u32 len;
1083
1084 perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1085 if (!perdatum)
1086 return -ENOMEM;
1087
1088 rc = next_entry(buf, fp, sizeof buf);
1089 if (rc)
1090 goto bad;
1091
1092 len = le32_to_cpu(buf[0]);
1093 perdatum->value = le32_to_cpu(buf[1]);
1094
1095 rc = str_read(&key, GFP_KERNEL, fp, len);
1096 if (rc)
1097 goto bad;
1098
1099 rc = hashtab_insert(h, key, perdatum);
1100 if (rc)
1101 goto bad;
1102
1103 return 0;
1104bad:
1105 perm_destroy(key, perdatum, NULL);
1106 return rc;
1107}
1108
1109static int common_read(struct policydb *p, struct hashtab *h, void *fp)
1110{
1111 char *key = NULL;
1112 struct common_datum *comdatum;
1113 __le32 buf[4];
1114 u32 len, nel;
1115 int i, rc;
1116
1117 comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1118 if (!comdatum)
1119 return -ENOMEM;
1120
1121 rc = next_entry(buf, fp, sizeof buf);
1122 if (rc)
1123 goto bad;
1124
1125 len = le32_to_cpu(buf[0]);
1126 comdatum->value = le32_to_cpu(buf[1]);
1127
1128 rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE);
1129 if (rc)
1130 goto bad;
1131 comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1132 nel = le32_to_cpu(buf[3]);
1133
1134 rc = str_read(&key, GFP_KERNEL, fp, len);
1135 if (rc)
1136 goto bad;
1137
1138 for (i = 0; i < nel; i++) {
1139 rc = perm_read(p, comdatum->permissions.table, fp);
1140 if (rc)
1141 goto bad;
1142 }
1143
1144 rc = hashtab_insert(h, key, comdatum);
1145 if (rc)
1146 goto bad;
1147 return 0;
1148bad:
1149 common_destroy(key, comdatum, NULL);
1150 return rc;
1151}
1152
1153static void type_set_init(struct type_set *t)
1154{
1155 ebitmap_init(&t->types);
1156 ebitmap_init(&t->negset);
1157}
1158
1159static int type_set_read(struct type_set *t, void *fp)
1160{
1161 __le32 buf[1];
1162 int rc;
1163
1164 if (ebitmap_read(&t->types, fp))
1165 return -EINVAL;
1166 if (ebitmap_read(&t->negset, fp))
1167 return -EINVAL;
1168
1169 rc = next_entry(buf, fp, sizeof(u32));
1170 if (rc < 0)
1171 return -EINVAL;
1172 t->flags = le32_to_cpu(buf[0]);
1173
1174 return 0;
1175}
1176
1177
1178static int read_cons_helper(struct policydb *p,
1179 struct constraint_node **nodep,
1180 int ncons, int allowxtarget, void *fp)
1181{
1182 struct constraint_node *c, *lc;
1183 struct constraint_expr *e, *le;
1184 __le32 buf[3];
1185 u32 nexpr;
1186 int rc, i, j, depth;
1187
1188 lc = NULL;
1189 for (i = 0; i < ncons; i++) {
1190 c = kzalloc(sizeof(*c), GFP_KERNEL);
1191 if (!c)
1192 return -ENOMEM;
1193
1194 if (lc)
1195 lc->next = c;
1196 else
1197 *nodep = c;
1198
1199 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1200 if (rc)
1201 return rc;
1202 c->permissions = le32_to_cpu(buf[0]);
1203 nexpr = le32_to_cpu(buf[1]);
1204 le = NULL;
1205 depth = -1;
1206 for (j = 0; j < nexpr; j++) {
1207 e = kzalloc(sizeof(*e), GFP_KERNEL);
1208 if (!e)
1209 return -ENOMEM;
1210
1211 if (le)
1212 le->next = e;
1213 else
1214 c->expr = e;
1215
1216 rc = next_entry(buf, fp, (sizeof(u32) * 3));
1217 if (rc)
1218 return rc;
1219 e->expr_type = le32_to_cpu(buf[0]);
1220 e->attr = le32_to_cpu(buf[1]);
1221 e->op = le32_to_cpu(buf[2]);
1222
1223 switch (e->expr_type) {
1224 case CEXPR_NOT:
1225 if (depth < 0)
1226 return -EINVAL;
1227 break;
1228 case CEXPR_AND:
1229 case CEXPR_OR:
1230 if (depth < 1)
1231 return -EINVAL;
1232 depth--;
1233 break;
1234 case CEXPR_ATTR:
1235 if (depth == (CEXPR_MAXDEPTH - 1))
1236 return -EINVAL;
1237 depth++;
1238 break;
1239 case CEXPR_NAMES:
1240 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1241 return -EINVAL;
1242 if (depth == (CEXPR_MAXDEPTH - 1))
1243 return -EINVAL;
1244 depth++;
1245 rc = ebitmap_read(&e->names, fp);
1246 if (rc)
1247 return rc;
1248 if (p->policyvers >=
1249 POLICYDB_VERSION_CONSTRAINT_NAMES) {
1250 e->type_names = kzalloc(sizeof
1251 (*e->type_names),
1252 GFP_KERNEL);
1253 if (!e->type_names)
1254 return -ENOMEM;
1255 type_set_init(e->type_names);
1256 rc = type_set_read(e->type_names, fp);
1257 if (rc)
1258 return rc;
1259 }
1260 break;
1261 default:
1262 return -EINVAL;
1263 }
1264 le = e;
1265 }
1266 if (depth != 0)
1267 return -EINVAL;
1268 lc = c;
1269 }
1270
1271 return 0;
1272}
1273
1274static int class_read(struct policydb *p, struct hashtab *h, void *fp)
1275{
1276 char *key = NULL;
1277 struct class_datum *cladatum;
1278 __le32 buf[6];
1279 u32 len, len2, ncons, nel;
1280 int i, rc;
1281
1282 cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1283 if (!cladatum)
1284 return -ENOMEM;
1285
1286 rc = next_entry(buf, fp, sizeof(u32)*6);
1287 if (rc)
1288 goto bad;
1289
1290 len = le32_to_cpu(buf[0]);
1291 len2 = le32_to_cpu(buf[1]);
1292 cladatum->value = le32_to_cpu(buf[2]);
1293
1294 rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE);
1295 if (rc)
1296 goto bad;
1297 cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1298 nel = le32_to_cpu(buf[4]);
1299
1300 ncons = le32_to_cpu(buf[5]);
1301
1302 rc = str_read(&key, GFP_KERNEL, fp, len);
1303 if (rc)
1304 goto bad;
1305
1306 if (len2) {
1307 rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2);
1308 if (rc)
1309 goto bad;
1310
1311 rc = -EINVAL;
1312 cladatum->comdatum = hashtab_search(p->p_commons.table, cladatum->comkey);
1313 if (!cladatum->comdatum) {
1314 pr_err("SELinux: unknown common %s\n",
1315 cladatum->comkey);
1316 goto bad;
1317 }
1318 }
1319 for (i = 0; i < nel; i++) {
1320 rc = perm_read(p, cladatum->permissions.table, fp);
1321 if (rc)
1322 goto bad;
1323 }
1324
1325 rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
1326 if (rc)
1327 goto bad;
1328
1329 if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1330
1331 rc = next_entry(buf, fp, sizeof(u32));
1332 if (rc)
1333 goto bad;
1334 ncons = le32_to_cpu(buf[0]);
1335 rc = read_cons_helper(p, &cladatum->validatetrans,
1336 ncons, 1, fp);
1337 if (rc)
1338 goto bad;
1339 }
1340
1341 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
1342 rc = next_entry(buf, fp, sizeof(u32) * 3);
1343 if (rc)
1344 goto bad;
1345
1346 cladatum->default_user = le32_to_cpu(buf[0]);
1347 cladatum->default_role = le32_to_cpu(buf[1]);
1348 cladatum->default_range = le32_to_cpu(buf[2]);
1349 }
1350
1351 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
1352 rc = next_entry(buf, fp, sizeof(u32) * 1);
1353 if (rc)
1354 goto bad;
1355 cladatum->default_type = le32_to_cpu(buf[0]);
1356 }
1357
1358 rc = hashtab_insert(h, key, cladatum);
1359 if (rc)
1360 goto bad;
1361
1362 return 0;
1363bad:
1364 cls_destroy(key, cladatum, NULL);
1365 return rc;
1366}
1367
1368static int role_read(struct policydb *p, struct hashtab *h, void *fp)
1369{
1370 char *key = NULL;
1371 struct role_datum *role;
1372 int rc, to_read = 2;
1373 __le32 buf[3];
1374 u32 len;
1375
1376 role = kzalloc(sizeof(*role), GFP_KERNEL);
1377 if (!role)
1378 return -ENOMEM;
1379
1380 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1381 to_read = 3;
1382
1383 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1384 if (rc)
1385 goto bad;
1386
1387 len = le32_to_cpu(buf[0]);
1388 role->value = le32_to_cpu(buf[1]);
1389 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1390 role->bounds = le32_to_cpu(buf[2]);
1391
1392 rc = str_read(&key, GFP_KERNEL, fp, len);
1393 if (rc)
1394 goto bad;
1395
1396 rc = ebitmap_read(&role->dominates, fp);
1397 if (rc)
1398 goto bad;
1399
1400 rc = ebitmap_read(&role->types, fp);
1401 if (rc)
1402 goto bad;
1403
1404 if (strcmp(key, OBJECT_R) == 0) {
1405 rc = -EINVAL;
1406 if (role->value != OBJECT_R_VAL) {
1407 pr_err("SELinux: Role %s has wrong value %d\n",
1408 OBJECT_R, role->value);
1409 goto bad;
1410 }
1411 rc = 0;
1412 goto bad;
1413 }
1414
1415 rc = hashtab_insert(h, key, role);
1416 if (rc)
1417 goto bad;
1418 return 0;
1419bad:
1420 role_destroy(key, role, NULL);
1421 return rc;
1422}
1423
1424static int type_read(struct policydb *p, struct hashtab *h, void *fp)
1425{
1426 char *key = NULL;
1427 struct type_datum *typdatum;
1428 int rc, to_read = 3;
1429 __le32 buf[4];
1430 u32 len;
1431
1432 typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1433 if (!typdatum)
1434 return -ENOMEM;
1435
1436 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1437 to_read = 4;
1438
1439 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1440 if (rc)
1441 goto bad;
1442
1443 len = le32_to_cpu(buf[0]);
1444 typdatum->value = le32_to_cpu(buf[1]);
1445 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1446 u32 prop = le32_to_cpu(buf[2]);
1447
1448 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1449 typdatum->primary = 1;
1450 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1451 typdatum->attribute = 1;
1452
1453 typdatum->bounds = le32_to_cpu(buf[3]);
1454 } else {
1455 typdatum->primary = le32_to_cpu(buf[2]);
1456 }
1457
1458 rc = str_read(&key, GFP_KERNEL, fp, len);
1459 if (rc)
1460 goto bad;
1461
1462 rc = hashtab_insert(h, key, typdatum);
1463 if (rc)
1464 goto bad;
1465 return 0;
1466bad:
1467 type_destroy(key, typdatum, NULL);
1468 return rc;
1469}
1470
1471
1472
1473
1474
1475
1476static int mls_read_level(struct mls_level *lp, void *fp)
1477{
1478 __le32 buf[1];
1479 int rc;
1480
1481 memset(lp, 0, sizeof(*lp));
1482
1483 rc = next_entry(buf, fp, sizeof buf);
1484 if (rc) {
1485 pr_err("SELinux: mls: truncated level\n");
1486 return rc;
1487 }
1488 lp->sens = le32_to_cpu(buf[0]);
1489
1490 rc = ebitmap_read(&lp->cat, fp);
1491 if (rc) {
1492 pr_err("SELinux: mls: error reading level categories\n");
1493 return rc;
1494 }
1495 return 0;
1496}
1497
1498static int user_read(struct policydb *p, struct hashtab *h, void *fp)
1499{
1500 char *key = NULL;
1501 struct user_datum *usrdatum;
1502 int rc, to_read = 2;
1503 __le32 buf[3];
1504 u32 len;
1505
1506 usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1507 if (!usrdatum)
1508 return -ENOMEM;
1509
1510 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1511 to_read = 3;
1512
1513 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1514 if (rc)
1515 goto bad;
1516
1517 len = le32_to_cpu(buf[0]);
1518 usrdatum->value = le32_to_cpu(buf[1]);
1519 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1520 usrdatum->bounds = le32_to_cpu(buf[2]);
1521
1522 rc = str_read(&key, GFP_KERNEL, fp, len);
1523 if (rc)
1524 goto bad;
1525
1526 rc = ebitmap_read(&usrdatum->roles, fp);
1527 if (rc)
1528 goto bad;
1529
1530 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1531 rc = mls_read_range_helper(&usrdatum->range, fp);
1532 if (rc)
1533 goto bad;
1534 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1535 if (rc)
1536 goto bad;
1537 }
1538
1539 rc = hashtab_insert(h, key, usrdatum);
1540 if (rc)
1541 goto bad;
1542 return 0;
1543bad:
1544 user_destroy(key, usrdatum, NULL);
1545 return rc;
1546}
1547
1548static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
1549{
1550 char *key = NULL;
1551 struct level_datum *levdatum;
1552 int rc;
1553 __le32 buf[2];
1554 u32 len;
1555
1556 levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
1557 if (!levdatum)
1558 return -ENOMEM;
1559
1560 rc = next_entry(buf, fp, sizeof buf);
1561 if (rc)
1562 goto bad;
1563
1564 len = le32_to_cpu(buf[0]);
1565 levdatum->isalias = le32_to_cpu(buf[1]);
1566
1567 rc = str_read(&key, GFP_ATOMIC, fp, len);
1568 if (rc)
1569 goto bad;
1570
1571 rc = -ENOMEM;
1572 levdatum->level = kmalloc(sizeof(*levdatum->level), GFP_ATOMIC);
1573 if (!levdatum->level)
1574 goto bad;
1575
1576 rc = mls_read_level(levdatum->level, fp);
1577 if (rc)
1578 goto bad;
1579
1580 rc = hashtab_insert(h, key, levdatum);
1581 if (rc)
1582 goto bad;
1583 return 0;
1584bad:
1585 sens_destroy(key, levdatum, NULL);
1586 return rc;
1587}
1588
1589static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
1590{
1591 char *key = NULL;
1592 struct cat_datum *catdatum;
1593 int rc;
1594 __le32 buf[3];
1595 u32 len;
1596
1597 catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
1598 if (!catdatum)
1599 return -ENOMEM;
1600
1601 rc = next_entry(buf, fp, sizeof buf);
1602 if (rc)
1603 goto bad;
1604
1605 len = le32_to_cpu(buf[0]);
1606 catdatum->value = le32_to_cpu(buf[1]);
1607 catdatum->isalias = le32_to_cpu(buf[2]);
1608
1609 rc = str_read(&key, GFP_ATOMIC, fp, len);
1610 if (rc)
1611 goto bad;
1612
1613 rc = hashtab_insert(h, key, catdatum);
1614 if (rc)
1615 goto bad;
1616 return 0;
1617bad:
1618 cat_destroy(key, catdatum, NULL);
1619 return rc;
1620}
1621
1622static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
1623{
1624 common_read,
1625 class_read,
1626 role_read,
1627 type_read,
1628 user_read,
1629 cond_read_bool,
1630 sens_read,
1631 cat_read,
1632};
1633
1634static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1635{
1636 struct user_datum *upper, *user;
1637 struct policydb *p = datap;
1638 int depth = 0;
1639
1640 upper = user = datum;
1641 while (upper->bounds) {
1642 struct ebitmap_node *node;
1643 unsigned long bit;
1644
1645 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1646 pr_err("SELinux: user %s: "
1647 "too deep or looped boundary",
1648 (char *) key);
1649 return -EINVAL;
1650 }
1651
1652 upper = p->user_val_to_struct[upper->bounds - 1];
1653 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1654 if (ebitmap_get_bit(&upper->roles, bit))
1655 continue;
1656
1657 pr_err("SELinux: boundary violated policy: "
1658 "user=%s role=%s bounds=%s\n",
1659 sym_name(p, SYM_USERS, user->value - 1),
1660 sym_name(p, SYM_ROLES, bit),
1661 sym_name(p, SYM_USERS, upper->value - 1));
1662
1663 return -EINVAL;
1664 }
1665 }
1666
1667 return 0;
1668}
1669
1670static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1671{
1672 struct role_datum *upper, *role;
1673 struct policydb *p = datap;
1674 int depth = 0;
1675
1676 upper = role = datum;
1677 while (upper->bounds) {
1678 struct ebitmap_node *node;
1679 unsigned long bit;
1680
1681 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1682 pr_err("SELinux: role %s: "
1683 "too deep or looped bounds\n",
1684 (char *) key);
1685 return -EINVAL;
1686 }
1687
1688 upper = p->role_val_to_struct[upper->bounds - 1];
1689 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1690 if (ebitmap_get_bit(&upper->types, bit))
1691 continue;
1692
1693 pr_err("SELinux: boundary violated policy: "
1694 "role=%s type=%s bounds=%s\n",
1695 sym_name(p, SYM_ROLES, role->value - 1),
1696 sym_name(p, SYM_TYPES, bit),
1697 sym_name(p, SYM_ROLES, upper->value - 1));
1698
1699 return -EINVAL;
1700 }
1701 }
1702
1703 return 0;
1704}
1705
1706static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1707{
1708 struct type_datum *upper;
1709 struct policydb *p = datap;
1710 int depth = 0;
1711
1712 upper = datum;
1713 while (upper->bounds) {
1714 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1715 pr_err("SELinux: type %s: "
1716 "too deep or looped boundary\n",
1717 (char *) key);
1718 return -EINVAL;
1719 }
1720
1721 upper = p->type_val_to_struct_array[upper->bounds - 1];
1722 BUG_ON(!upper);
1723
1724 if (upper->attribute) {
1725 pr_err("SELinux: type %s: "
1726 "bounded by attribute %s",
1727 (char *) key,
1728 sym_name(p, SYM_TYPES, upper->value - 1));
1729 return -EINVAL;
1730 }
1731 }
1732
1733 return 0;
1734}
1735
1736static int policydb_bounds_sanity_check(struct policydb *p)
1737{
1738 int rc;
1739
1740 if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1741 return 0;
1742
1743 rc = hashtab_map(p->p_users.table,
1744 user_bounds_sanity_check, p);
1745 if (rc)
1746 return rc;
1747
1748 rc = hashtab_map(p->p_roles.table,
1749 role_bounds_sanity_check, p);
1750 if (rc)
1751 return rc;
1752
1753 rc = hashtab_map(p->p_types.table,
1754 type_bounds_sanity_check, p);
1755 if (rc)
1756 return rc;
1757
1758 return 0;
1759}
1760
1761u16 string_to_security_class(struct policydb *p, const char *name)
1762{
1763 struct class_datum *cladatum;
1764
1765 cladatum = hashtab_search(p->p_classes.table, name);
1766 if (!cladatum)
1767 return 0;
1768
1769 return cladatum->value;
1770}
1771
1772u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1773{
1774 struct class_datum *cladatum;
1775 struct perm_datum *perdatum = NULL;
1776 struct common_datum *comdatum;
1777
1778 if (!tclass || tclass > p->p_classes.nprim)
1779 return 0;
1780
1781 cladatum = p->class_val_to_struct[tclass-1];
1782 comdatum = cladatum->comdatum;
1783 if (comdatum)
1784 perdatum = hashtab_search(comdatum->permissions.table,
1785 name);
1786 if (!perdatum)
1787 perdatum = hashtab_search(cladatum->permissions.table,
1788 name);
1789 if (!perdatum)
1790 return 0;
1791
1792 return 1U << (perdatum->value-1);
1793}
1794
1795static int range_read(struct policydb *p, void *fp)
1796{
1797 struct range_trans *rt = NULL;
1798 struct mls_range *r = NULL;
1799 int i, rc;
1800 __le32 buf[2];
1801 u32 nel;
1802
1803 if (p->policyvers < POLICYDB_VERSION_MLS)
1804 return 0;
1805
1806 rc = next_entry(buf, fp, sizeof(u32));
1807 if (rc)
1808 return rc;
1809
1810 nel = le32_to_cpu(buf[0]);
1811 for (i = 0; i < nel; i++) {
1812 rc = -ENOMEM;
1813 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1814 if (!rt)
1815 goto out;
1816
1817 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1818 if (rc)
1819 goto out;
1820
1821 rt->source_type = le32_to_cpu(buf[0]);
1822 rt->target_type = le32_to_cpu(buf[1]);
1823 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1824 rc = next_entry(buf, fp, sizeof(u32));
1825 if (rc)
1826 goto out;
1827 rt->target_class = le32_to_cpu(buf[0]);
1828 } else
1829 rt->target_class = p->process_class;
1830
1831 rc = -EINVAL;
1832 if (!policydb_type_isvalid(p, rt->source_type) ||
1833 !policydb_type_isvalid(p, rt->target_type) ||
1834 !policydb_class_isvalid(p, rt->target_class))
1835 goto out;
1836
1837 rc = -ENOMEM;
1838 r = kzalloc(sizeof(*r), GFP_KERNEL);
1839 if (!r)
1840 goto out;
1841
1842 rc = mls_read_range_helper(r, fp);
1843 if (rc)
1844 goto out;
1845
1846 rc = -EINVAL;
1847 if (!mls_range_isvalid(p, r)) {
1848 pr_warn("SELinux: rangetrans: invalid range\n");
1849 goto out;
1850 }
1851
1852 rc = hashtab_insert(p->range_tr, rt, r);
1853 if (rc)
1854 goto out;
1855
1856 rt = NULL;
1857 r = NULL;
1858 }
1859 hash_eval(p->range_tr, "rangetr");
1860 rc = 0;
1861out:
1862 kfree(rt);
1863 kfree(r);
1864 return rc;
1865}
1866
1867static int filename_trans_read(struct policydb *p, void *fp)
1868{
1869 struct filename_trans *ft;
1870 struct filename_trans_datum *otype;
1871 char *name;
1872 u32 nel, len;
1873 __le32 buf[4];
1874 int rc, i;
1875
1876 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
1877 return 0;
1878
1879 rc = next_entry(buf, fp, sizeof(u32));
1880 if (rc)
1881 return rc;
1882 nel = le32_to_cpu(buf[0]);
1883
1884 for (i = 0; i < nel; i++) {
1885 otype = NULL;
1886 name = NULL;
1887
1888 rc = -ENOMEM;
1889 ft = kzalloc(sizeof(*ft), GFP_KERNEL);
1890 if (!ft)
1891 goto out;
1892
1893 rc = -ENOMEM;
1894 otype = kmalloc(sizeof(*otype), GFP_KERNEL);
1895 if (!otype)
1896 goto out;
1897
1898
1899 rc = next_entry(buf, fp, sizeof(u32));
1900 if (rc)
1901 goto out;
1902 len = le32_to_cpu(buf[0]);
1903
1904
1905 rc = str_read(&name, GFP_KERNEL, fp, len);
1906 if (rc)
1907 goto out;
1908
1909 ft->name = name;
1910
1911 rc = next_entry(buf, fp, sizeof(u32) * 4);
1912 if (rc)
1913 goto out;
1914
1915 ft->stype = le32_to_cpu(buf[0]);
1916 ft->ttype = le32_to_cpu(buf[1]);
1917 ft->tclass = le32_to_cpu(buf[2]);
1918
1919 otype->otype = le32_to_cpu(buf[3]);
1920
1921 rc = ebitmap_set_bit(&p->filename_trans_ttypes, ft->ttype, 1);
1922 if (rc)
1923 goto out;
1924
1925 rc = hashtab_insert(p->filename_trans, ft, otype);
1926 if (rc) {
1927
1928
1929
1930
1931 if (rc != -EEXIST)
1932 goto out;
1933
1934 kfree(ft);
1935 kfree(name);
1936 kfree(otype);
1937 }
1938 }
1939 hash_eval(p->filename_trans, "filenametr");
1940 return 0;
1941out:
1942 kfree(ft);
1943 kfree(name);
1944 kfree(otype);
1945
1946 return rc;
1947}
1948
1949static int genfs_read(struct policydb *p, void *fp)
1950{
1951 int i, j, rc;
1952 u32 nel, nel2, len, len2;
1953 __le32 buf[1];
1954 struct ocontext *l, *c;
1955 struct ocontext *newc = NULL;
1956 struct genfs *genfs_p, *genfs;
1957 struct genfs *newgenfs = NULL;
1958
1959 rc = next_entry(buf, fp, sizeof(u32));
1960 if (rc)
1961 return rc;
1962 nel = le32_to_cpu(buf[0]);
1963
1964 for (i = 0; i < nel; i++) {
1965 rc = next_entry(buf, fp, sizeof(u32));
1966 if (rc)
1967 goto out;
1968 len = le32_to_cpu(buf[0]);
1969
1970 rc = -ENOMEM;
1971 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
1972 if (!newgenfs)
1973 goto out;
1974
1975 rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
1976 if (rc)
1977 goto out;
1978
1979 for (genfs_p = NULL, genfs = p->genfs; genfs;
1980 genfs_p = genfs, genfs = genfs->next) {
1981 rc = -EINVAL;
1982 if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
1983 pr_err("SELinux: dup genfs fstype %s\n",
1984 newgenfs->fstype);
1985 goto out;
1986 }
1987 if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
1988 break;
1989 }
1990 newgenfs->next = genfs;
1991 if (genfs_p)
1992 genfs_p->next = newgenfs;
1993 else
1994 p->genfs = newgenfs;
1995 genfs = newgenfs;
1996 newgenfs = NULL;
1997
1998 rc = next_entry(buf, fp, sizeof(u32));
1999 if (rc)
2000 goto out;
2001
2002 nel2 = le32_to_cpu(buf[0]);
2003 for (j = 0; j < nel2; j++) {
2004 rc = next_entry(buf, fp, sizeof(u32));
2005 if (rc)
2006 goto out;
2007 len = le32_to_cpu(buf[0]);
2008
2009 rc = -ENOMEM;
2010 newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2011 if (!newc)
2012 goto out;
2013
2014 rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
2015 if (rc)
2016 goto out;
2017
2018 rc = next_entry(buf, fp, sizeof(u32));
2019 if (rc)
2020 goto out;
2021
2022 newc->v.sclass = le32_to_cpu(buf[0]);
2023 rc = context_read_and_validate(&newc->context[0], p, fp);
2024 if (rc)
2025 goto out;
2026
2027 for (l = NULL, c = genfs->head; c;
2028 l = c, c = c->next) {
2029 rc = -EINVAL;
2030 if (!strcmp(newc->u.name, c->u.name) &&
2031 (!c->v.sclass || !newc->v.sclass ||
2032 newc->v.sclass == c->v.sclass)) {
2033 pr_err("SELinux: dup genfs entry (%s,%s)\n",
2034 genfs->fstype, c->u.name);
2035 goto out;
2036 }
2037 len = strlen(newc->u.name);
2038 len2 = strlen(c->u.name);
2039 if (len > len2)
2040 break;
2041 }
2042
2043 newc->next = c;
2044 if (l)
2045 l->next = newc;
2046 else
2047 genfs->head = newc;
2048 newc = NULL;
2049 }
2050 }
2051 rc = 0;
2052out:
2053 if (newgenfs) {
2054 kfree(newgenfs->fstype);
2055 kfree(newgenfs);
2056 }
2057 ocontext_destroy(newc, OCON_FSUSE);
2058
2059 return rc;
2060}
2061
2062static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
2063 void *fp)
2064{
2065 int i, j, rc;
2066 u32 nel, len;
2067 __be64 prefixbuf[1];
2068 __le32 buf[3];
2069 struct ocontext *l, *c;
2070 u32 nodebuf[8];
2071
2072 for (i = 0; i < info->ocon_num; i++) {
2073 rc = next_entry(buf, fp, sizeof(u32));
2074 if (rc)
2075 goto out;
2076 nel = le32_to_cpu(buf[0]);
2077
2078 l = NULL;
2079 for (j = 0; j < nel; j++) {
2080 rc = -ENOMEM;
2081 c = kzalloc(sizeof(*c), GFP_KERNEL);
2082 if (!c)
2083 goto out;
2084 if (l)
2085 l->next = c;
2086 else
2087 p->ocontexts[i] = c;
2088 l = c;
2089
2090 switch (i) {
2091 case OCON_ISID:
2092 rc = next_entry(buf, fp, sizeof(u32));
2093 if (rc)
2094 goto out;
2095
2096 c->sid[0] = le32_to_cpu(buf[0]);
2097 rc = context_read_and_validate(&c->context[0], p, fp);
2098 if (rc)
2099 goto out;
2100 break;
2101 case OCON_FS:
2102 case OCON_NETIF:
2103 rc = next_entry(buf, fp, sizeof(u32));
2104 if (rc)
2105 goto out;
2106 len = le32_to_cpu(buf[0]);
2107
2108 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2109 if (rc)
2110 goto out;
2111
2112 rc = context_read_and_validate(&c->context[0], p, fp);
2113 if (rc)
2114 goto out;
2115 rc = context_read_and_validate(&c->context[1], p, fp);
2116 if (rc)
2117 goto out;
2118 break;
2119 case OCON_PORT:
2120 rc = next_entry(buf, fp, sizeof(u32)*3);
2121 if (rc)
2122 goto out;
2123 c->u.port.protocol = le32_to_cpu(buf[0]);
2124 c->u.port.low_port = le32_to_cpu(buf[1]);
2125 c->u.port.high_port = le32_to_cpu(buf[2]);
2126 rc = context_read_and_validate(&c->context[0], p, fp);
2127 if (rc)
2128 goto out;
2129 break;
2130 case OCON_NODE:
2131 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2132 if (rc)
2133 goto out;
2134 c->u.node.addr = nodebuf[0];
2135 c->u.node.mask = nodebuf[1];
2136 rc = context_read_and_validate(&c->context[0], p, fp);
2137 if (rc)
2138 goto out;
2139 break;
2140 case OCON_FSUSE:
2141 rc = next_entry(buf, fp, sizeof(u32)*2);
2142 if (rc)
2143 goto out;
2144
2145 rc = -EINVAL;
2146 c->v.behavior = le32_to_cpu(buf[0]);
2147
2148 if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
2149 goto out;
2150 if (c->v.behavior > SECURITY_FS_USE_MAX)
2151 goto out;
2152
2153 len = le32_to_cpu(buf[1]);
2154 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2155 if (rc)
2156 goto out;
2157
2158 rc = context_read_and_validate(&c->context[0], p, fp);
2159 if (rc)
2160 goto out;
2161 break;
2162 case OCON_NODE6: {
2163 int k;
2164
2165 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2166 if (rc)
2167 goto out;
2168 for (k = 0; k < 4; k++)
2169 c->u.node6.addr[k] = nodebuf[k];
2170 for (k = 0; k < 4; k++)
2171 c->u.node6.mask[k] = nodebuf[k+4];
2172 rc = context_read_and_validate(&c->context[0], p, fp);
2173 if (rc)
2174 goto out;
2175 break;
2176 }
2177 case OCON_IBPKEY: {
2178 u32 pkey_lo, pkey_hi;
2179
2180 rc = next_entry(prefixbuf, fp, sizeof(u64));
2181 if (rc)
2182 goto out;
2183
2184
2185 c->u.ibpkey.subnet_prefix = be64_to_cpu(prefixbuf[0]);
2186
2187 rc = next_entry(buf, fp, sizeof(u32) * 2);
2188 if (rc)
2189 goto out;
2190
2191 pkey_lo = le32_to_cpu(buf[0]);
2192 pkey_hi = le32_to_cpu(buf[1]);
2193
2194 if (pkey_lo > U16_MAX || pkey_hi > U16_MAX) {
2195 rc = -EINVAL;
2196 goto out;
2197 }
2198
2199 c->u.ibpkey.low_pkey = pkey_lo;
2200 c->u.ibpkey.high_pkey = pkey_hi;
2201
2202 rc = context_read_and_validate(&c->context[0],
2203 p,
2204 fp);
2205 if (rc)
2206 goto out;
2207 break;
2208 }
2209 case OCON_IBENDPORT: {
2210 u32 port;
2211
2212 rc = next_entry(buf, fp, sizeof(u32) * 2);
2213 if (rc)
2214 goto out;
2215 len = le32_to_cpu(buf[0]);
2216
2217 rc = str_read(&c->u.ibendport.dev_name, GFP_KERNEL, fp, len);
2218 if (rc)
2219 goto out;
2220
2221 port = le32_to_cpu(buf[1]);
2222 if (port > U8_MAX || port == 0) {
2223 rc = -EINVAL;
2224 goto out;
2225 }
2226
2227 c->u.ibendport.port = port;
2228
2229 rc = context_read_and_validate(&c->context[0],
2230 p,
2231 fp);
2232 if (rc)
2233 goto out;
2234 break;
2235 }
2236 }
2237 }
2238 }
2239 rc = 0;
2240out:
2241 return rc;
2242}
2243
2244
2245
2246
2247
2248int policydb_read(struct policydb *p, void *fp)
2249{
2250 struct role_allow *ra, *lra;
2251 struct role_trans *tr, *ltr;
2252 int i, j, rc;
2253 __le32 buf[4];
2254 u32 len, nprim, nel;
2255
2256 char *policydb_str;
2257 struct policydb_compat_info *info;
2258
2259 rc = policydb_init(p);
2260 if (rc)
2261 return rc;
2262
2263
2264 rc = next_entry(buf, fp, sizeof(u32) * 2);
2265 if (rc)
2266 goto bad;
2267
2268 rc = -EINVAL;
2269 if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2270 pr_err("SELinux: policydb magic number 0x%x does "
2271 "not match expected magic number 0x%x\n",
2272 le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2273 goto bad;
2274 }
2275
2276 rc = -EINVAL;
2277 len = le32_to_cpu(buf[1]);
2278 if (len != strlen(POLICYDB_STRING)) {
2279 pr_err("SELinux: policydb string length %d does not "
2280 "match expected length %zu\n",
2281 len, strlen(POLICYDB_STRING));
2282 goto bad;
2283 }
2284
2285 rc = -ENOMEM;
2286 policydb_str = kmalloc(len + 1, GFP_KERNEL);
2287 if (!policydb_str) {
2288 pr_err("SELinux: unable to allocate memory for policydb "
2289 "string of length %d\n", len);
2290 goto bad;
2291 }
2292
2293 rc = next_entry(policydb_str, fp, len);
2294 if (rc) {
2295 pr_err("SELinux: truncated policydb string identifier\n");
2296 kfree(policydb_str);
2297 goto bad;
2298 }
2299
2300 rc = -EINVAL;
2301 policydb_str[len] = '\0';
2302 if (strcmp(policydb_str, POLICYDB_STRING)) {
2303 pr_err("SELinux: policydb string %s does not match "
2304 "my string %s\n", policydb_str, POLICYDB_STRING);
2305 kfree(policydb_str);
2306 goto bad;
2307 }
2308
2309 kfree(policydb_str);
2310 policydb_str = NULL;
2311
2312
2313 rc = next_entry(buf, fp, sizeof(u32)*4);
2314 if (rc)
2315 goto bad;
2316
2317 rc = -EINVAL;
2318 p->policyvers = le32_to_cpu(buf[0]);
2319 if (p->policyvers < POLICYDB_VERSION_MIN ||
2320 p->policyvers > POLICYDB_VERSION_MAX) {
2321 pr_err("SELinux: policydb version %d does not match "
2322 "my version range %d-%d\n",
2323 le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2324 goto bad;
2325 }
2326
2327 if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2328 p->mls_enabled = 1;
2329
2330 rc = -EINVAL;
2331 if (p->policyvers < POLICYDB_VERSION_MLS) {
2332 pr_err("SELinux: security policydb version %d "
2333 "(MLS) not backwards compatible\n",
2334 p->policyvers);
2335 goto bad;
2336 }
2337 }
2338 p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2339 p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2340
2341 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2342 rc = ebitmap_read(&p->policycaps, fp);
2343 if (rc)
2344 goto bad;
2345 }
2346
2347 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2348 rc = ebitmap_read(&p->permissive_map, fp);
2349 if (rc)
2350 goto bad;
2351 }
2352
2353 rc = -EINVAL;
2354 info = policydb_lookup_compat(p->policyvers);
2355 if (!info) {
2356 pr_err("SELinux: unable to find policy compat info "
2357 "for version %d\n", p->policyvers);
2358 goto bad;
2359 }
2360
2361 rc = -EINVAL;
2362 if (le32_to_cpu(buf[2]) != info->sym_num ||
2363 le32_to_cpu(buf[3]) != info->ocon_num) {
2364 pr_err("SELinux: policydb table sizes (%d,%d) do "
2365 "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2366 le32_to_cpu(buf[3]),
2367 info->sym_num, info->ocon_num);
2368 goto bad;
2369 }
2370
2371 for (i = 0; i < info->sym_num; i++) {
2372 rc = next_entry(buf, fp, sizeof(u32)*2);
2373 if (rc)
2374 goto bad;
2375 nprim = le32_to_cpu(buf[0]);
2376 nel = le32_to_cpu(buf[1]);
2377 for (j = 0; j < nel; j++) {
2378 rc = read_f[i](p, p->symtab[i].table, fp);
2379 if (rc)
2380 goto bad;
2381 }
2382
2383 p->symtab[i].nprim = nprim;
2384 }
2385
2386 rc = -EINVAL;
2387 p->process_class = string_to_security_class(p, "process");
2388 if (!p->process_class)
2389 goto bad;
2390
2391 rc = avtab_read(&p->te_avtab, fp, p);
2392 if (rc)
2393 goto bad;
2394
2395 if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2396 rc = cond_read_list(p, fp);
2397 if (rc)
2398 goto bad;
2399 }
2400
2401 rc = next_entry(buf, fp, sizeof(u32));
2402 if (rc)
2403 goto bad;
2404 nel = le32_to_cpu(buf[0]);
2405 ltr = NULL;
2406 for (i = 0; i < nel; i++) {
2407 rc = -ENOMEM;
2408 tr = kzalloc(sizeof(*tr), GFP_KERNEL);
2409 if (!tr)
2410 goto bad;
2411 if (ltr)
2412 ltr->next = tr;
2413 else
2414 p->role_tr = tr;
2415 rc = next_entry(buf, fp, sizeof(u32)*3);
2416 if (rc)
2417 goto bad;
2418
2419 rc = -EINVAL;
2420 tr->role = le32_to_cpu(buf[0]);
2421 tr->type = le32_to_cpu(buf[1]);
2422 tr->new_role = le32_to_cpu(buf[2]);
2423 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2424 rc = next_entry(buf, fp, sizeof(u32));
2425 if (rc)
2426 goto bad;
2427 tr->tclass = le32_to_cpu(buf[0]);
2428 } else
2429 tr->tclass = p->process_class;
2430
2431 rc = -EINVAL;
2432 if (!policydb_role_isvalid(p, tr->role) ||
2433 !policydb_type_isvalid(p, tr->type) ||
2434 !policydb_class_isvalid(p, tr->tclass) ||
2435 !policydb_role_isvalid(p, tr->new_role))
2436 goto bad;
2437 ltr = tr;
2438 }
2439
2440 rc = next_entry(buf, fp, sizeof(u32));
2441 if (rc)
2442 goto bad;
2443 nel = le32_to_cpu(buf[0]);
2444 lra = NULL;
2445 for (i = 0; i < nel; i++) {
2446 rc = -ENOMEM;
2447 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2448 if (!ra)
2449 goto bad;
2450 if (lra)
2451 lra->next = ra;
2452 else
2453 p->role_allow = ra;
2454 rc = next_entry(buf, fp, sizeof(u32)*2);
2455 if (rc)
2456 goto bad;
2457
2458 rc = -EINVAL;
2459 ra->role = le32_to_cpu(buf[0]);
2460 ra->new_role = le32_to_cpu(buf[1]);
2461 if (!policydb_role_isvalid(p, ra->role) ||
2462 !policydb_role_isvalid(p, ra->new_role))
2463 goto bad;
2464 lra = ra;
2465 }
2466
2467 rc = filename_trans_read(p, fp);
2468 if (rc)
2469 goto bad;
2470
2471 rc = policydb_index(p);
2472 if (rc)
2473 goto bad;
2474
2475 rc = -EINVAL;
2476 p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition");
2477 p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition");
2478 if (!p->process_trans_perms)
2479 goto bad;
2480
2481 rc = ocontext_read(p, info, fp);
2482 if (rc)
2483 goto bad;
2484
2485 rc = genfs_read(p, fp);
2486 if (rc)
2487 goto bad;
2488
2489 rc = range_read(p, fp);
2490 if (rc)
2491 goto bad;
2492
2493 p->type_attr_map_array = kvcalloc(p->p_types.nprim,
2494 sizeof(*p->type_attr_map_array),
2495 GFP_KERNEL);
2496 if (!p->type_attr_map_array)
2497 goto bad;
2498
2499
2500 for (i = 0; i < p->p_types.nprim; i++)
2501 ebitmap_init(&p->type_attr_map_array[i]);
2502
2503 for (i = 0; i < p->p_types.nprim; i++) {
2504 struct ebitmap *e = &p->type_attr_map_array[i];
2505
2506 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2507 rc = ebitmap_read(e, fp);
2508 if (rc)
2509 goto bad;
2510 }
2511
2512 rc = ebitmap_set_bit(e, i, 1);
2513 if (rc)
2514 goto bad;
2515 }
2516
2517 rc = policydb_bounds_sanity_check(p);
2518 if (rc)
2519 goto bad;
2520
2521 rc = 0;
2522out:
2523 return rc;
2524bad:
2525 policydb_destroy(p);
2526 goto out;
2527}
2528
2529
2530
2531
2532
2533static int mls_write_level(struct mls_level *l, void *fp)
2534{
2535 __le32 buf[1];
2536 int rc;
2537
2538 buf[0] = cpu_to_le32(l->sens);
2539 rc = put_entry(buf, sizeof(u32), 1, fp);
2540 if (rc)
2541 return rc;
2542
2543 rc = ebitmap_write(&l->cat, fp);
2544 if (rc)
2545 return rc;
2546
2547 return 0;
2548}
2549
2550
2551
2552
2553
2554static int mls_write_range_helper(struct mls_range *r, void *fp)
2555{
2556 __le32 buf[3];
2557 size_t items;
2558 int rc, eq;
2559
2560 eq = mls_level_eq(&r->level[1], &r->level[0]);
2561
2562 if (eq)
2563 items = 2;
2564 else
2565 items = 3;
2566 buf[0] = cpu_to_le32(items-1);
2567 buf[1] = cpu_to_le32(r->level[0].sens);
2568 if (!eq)
2569 buf[2] = cpu_to_le32(r->level[1].sens);
2570
2571 BUG_ON(items > ARRAY_SIZE(buf));
2572
2573 rc = put_entry(buf, sizeof(u32), items, fp);
2574 if (rc)
2575 return rc;
2576
2577 rc = ebitmap_write(&r->level[0].cat, fp);
2578 if (rc)
2579 return rc;
2580 if (!eq) {
2581 rc = ebitmap_write(&r->level[1].cat, fp);
2582 if (rc)
2583 return rc;
2584 }
2585
2586 return 0;
2587}
2588
2589static int sens_write(void *vkey, void *datum, void *ptr)
2590{
2591 char *key = vkey;
2592 struct level_datum *levdatum = datum;
2593 struct policy_data *pd = ptr;
2594 void *fp = pd->fp;
2595 __le32 buf[2];
2596 size_t len;
2597 int rc;
2598
2599 len = strlen(key);
2600 buf[0] = cpu_to_le32(len);
2601 buf[1] = cpu_to_le32(levdatum->isalias);
2602 rc = put_entry(buf, sizeof(u32), 2, fp);
2603 if (rc)
2604 return rc;
2605
2606 rc = put_entry(key, 1, len, fp);
2607 if (rc)
2608 return rc;
2609
2610 rc = mls_write_level(levdatum->level, fp);
2611 if (rc)
2612 return rc;
2613
2614 return 0;
2615}
2616
2617static int cat_write(void *vkey, void *datum, void *ptr)
2618{
2619 char *key = vkey;
2620 struct cat_datum *catdatum = datum;
2621 struct policy_data *pd = ptr;
2622 void *fp = pd->fp;
2623 __le32 buf[3];
2624 size_t len;
2625 int rc;
2626
2627 len = strlen(key);
2628 buf[0] = cpu_to_le32(len);
2629 buf[1] = cpu_to_le32(catdatum->value);
2630 buf[2] = cpu_to_le32(catdatum->isalias);
2631 rc = put_entry(buf, sizeof(u32), 3, fp);
2632 if (rc)
2633 return rc;
2634
2635 rc = put_entry(key, 1, len, fp);
2636 if (rc)
2637 return rc;
2638
2639 return 0;
2640}
2641
2642static int role_trans_write(struct policydb *p, void *fp)
2643{
2644 struct role_trans *r = p->role_tr;
2645 struct role_trans *tr;
2646 u32 buf[3];
2647 size_t nel;
2648 int rc;
2649
2650 nel = 0;
2651 for (tr = r; tr; tr = tr->next)
2652 nel++;
2653 buf[0] = cpu_to_le32(nel);
2654 rc = put_entry(buf, sizeof(u32), 1, fp);
2655 if (rc)
2656 return rc;
2657 for (tr = r; tr; tr = tr->next) {
2658 buf[0] = cpu_to_le32(tr->role);
2659 buf[1] = cpu_to_le32(tr->type);
2660 buf[2] = cpu_to_le32(tr->new_role);
2661 rc = put_entry(buf, sizeof(u32), 3, fp);
2662 if (rc)
2663 return rc;
2664 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2665 buf[0] = cpu_to_le32(tr->tclass);
2666 rc = put_entry(buf, sizeof(u32), 1, fp);
2667 if (rc)
2668 return rc;
2669 }
2670 }
2671
2672 return 0;
2673}
2674
2675static int role_allow_write(struct role_allow *r, void *fp)
2676{
2677 struct role_allow *ra;
2678 u32 buf[2];
2679 size_t nel;
2680 int rc;
2681
2682 nel = 0;
2683 for (ra = r; ra; ra = ra->next)
2684 nel++;
2685 buf[0] = cpu_to_le32(nel);
2686 rc = put_entry(buf, sizeof(u32), 1, fp);
2687 if (rc)
2688 return rc;
2689 for (ra = r; ra; ra = ra->next) {
2690 buf[0] = cpu_to_le32(ra->role);
2691 buf[1] = cpu_to_le32(ra->new_role);
2692 rc = put_entry(buf, sizeof(u32), 2, fp);
2693 if (rc)
2694 return rc;
2695 }
2696 return 0;
2697}
2698
2699
2700
2701
2702
2703static int context_write(struct policydb *p, struct context *c,
2704 void *fp)
2705{
2706 int rc;
2707 __le32 buf[3];
2708
2709 buf[0] = cpu_to_le32(c->user);
2710 buf[1] = cpu_to_le32(c->role);
2711 buf[2] = cpu_to_le32(c->type);
2712
2713 rc = put_entry(buf, sizeof(u32), 3, fp);
2714 if (rc)
2715 return rc;
2716
2717 rc = mls_write_range_helper(&c->range, fp);
2718 if (rc)
2719 return rc;
2720
2721 return 0;
2722}
2723
2724
2725
2726
2727
2728
2729
2730static int perm_write(void *vkey, void *datum, void *fp)
2731{
2732 char *key = vkey;
2733 struct perm_datum *perdatum = datum;
2734 __le32 buf[2];
2735 size_t len;
2736 int rc;
2737
2738 len = strlen(key);
2739 buf[0] = cpu_to_le32(len);
2740 buf[1] = cpu_to_le32(perdatum->value);
2741 rc = put_entry(buf, sizeof(u32), 2, fp);
2742 if (rc)
2743 return rc;
2744
2745 rc = put_entry(key, 1, len, fp);
2746 if (rc)
2747 return rc;
2748
2749 return 0;
2750}
2751
2752static int common_write(void *vkey, void *datum, void *ptr)
2753{
2754 char *key = vkey;
2755 struct common_datum *comdatum = datum;
2756 struct policy_data *pd = ptr;
2757 void *fp = pd->fp;
2758 __le32 buf[4];
2759 size_t len;
2760 int rc;
2761
2762 len = strlen(key);
2763 buf[0] = cpu_to_le32(len);
2764 buf[1] = cpu_to_le32(comdatum->value);
2765 buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2766 buf[3] = cpu_to_le32(comdatum->permissions.table->nel);
2767 rc = put_entry(buf, sizeof(u32), 4, fp);
2768 if (rc)
2769 return rc;
2770
2771 rc = put_entry(key, 1, len, fp);
2772 if (rc)
2773 return rc;
2774
2775 rc = hashtab_map(comdatum->permissions.table, perm_write, fp);
2776 if (rc)
2777 return rc;
2778
2779 return 0;
2780}
2781
2782static int type_set_write(struct type_set *t, void *fp)
2783{
2784 int rc;
2785 __le32 buf[1];
2786
2787 if (ebitmap_write(&t->types, fp))
2788 return -EINVAL;
2789 if (ebitmap_write(&t->negset, fp))
2790 return -EINVAL;
2791
2792 buf[0] = cpu_to_le32(t->flags);
2793 rc = put_entry(buf, sizeof(u32), 1, fp);
2794 if (rc)
2795 return -EINVAL;
2796
2797 return 0;
2798}
2799
2800static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2801 void *fp)
2802{
2803 struct constraint_node *c;
2804 struct constraint_expr *e;
2805 __le32 buf[3];
2806 u32 nel;
2807 int rc;
2808
2809 for (c = node; c; c = c->next) {
2810 nel = 0;
2811 for (e = c->expr; e; e = e->next)
2812 nel++;
2813 buf[0] = cpu_to_le32(c->permissions);
2814 buf[1] = cpu_to_le32(nel);
2815 rc = put_entry(buf, sizeof(u32), 2, fp);
2816 if (rc)
2817 return rc;
2818 for (e = c->expr; e; e = e->next) {
2819 buf[0] = cpu_to_le32(e->expr_type);
2820 buf[1] = cpu_to_le32(e->attr);
2821 buf[2] = cpu_to_le32(e->op);
2822 rc = put_entry(buf, sizeof(u32), 3, fp);
2823 if (rc)
2824 return rc;
2825
2826 switch (e->expr_type) {
2827 case CEXPR_NAMES:
2828 rc = ebitmap_write(&e->names, fp);
2829 if (rc)
2830 return rc;
2831 if (p->policyvers >=
2832 POLICYDB_VERSION_CONSTRAINT_NAMES) {
2833 rc = type_set_write(e->type_names, fp);
2834 if (rc)
2835 return rc;
2836 }
2837 break;
2838 default:
2839 break;
2840 }
2841 }
2842 }
2843
2844 return 0;
2845}
2846
2847static int class_write(void *vkey, void *datum, void *ptr)
2848{
2849 char *key = vkey;
2850 struct class_datum *cladatum = datum;
2851 struct policy_data *pd = ptr;
2852 void *fp = pd->fp;
2853 struct policydb *p = pd->p;
2854 struct constraint_node *c;
2855 __le32 buf[6];
2856 u32 ncons;
2857 size_t len, len2;
2858 int rc;
2859
2860 len = strlen(key);
2861 if (cladatum->comkey)
2862 len2 = strlen(cladatum->comkey);
2863 else
2864 len2 = 0;
2865
2866 ncons = 0;
2867 for (c = cladatum->constraints; c; c = c->next)
2868 ncons++;
2869
2870 buf[0] = cpu_to_le32(len);
2871 buf[1] = cpu_to_le32(len2);
2872 buf[2] = cpu_to_le32(cladatum->value);
2873 buf[3] = cpu_to_le32(cladatum->permissions.nprim);
2874 if (cladatum->permissions.table)
2875 buf[4] = cpu_to_le32(cladatum->permissions.table->nel);
2876 else
2877 buf[4] = 0;
2878 buf[5] = cpu_to_le32(ncons);
2879 rc = put_entry(buf, sizeof(u32), 6, fp);
2880 if (rc)
2881 return rc;
2882
2883 rc = put_entry(key, 1, len, fp);
2884 if (rc)
2885 return rc;
2886
2887 if (cladatum->comkey) {
2888 rc = put_entry(cladatum->comkey, 1, len2, fp);
2889 if (rc)
2890 return rc;
2891 }
2892
2893 rc = hashtab_map(cladatum->permissions.table, perm_write, fp);
2894 if (rc)
2895 return rc;
2896
2897 rc = write_cons_helper(p, cladatum->constraints, fp);
2898 if (rc)
2899 return rc;
2900
2901
2902 ncons = 0;
2903 for (c = cladatum->validatetrans; c; c = c->next)
2904 ncons++;
2905
2906 buf[0] = cpu_to_le32(ncons);
2907 rc = put_entry(buf, sizeof(u32), 1, fp);
2908 if (rc)
2909 return rc;
2910
2911 rc = write_cons_helper(p, cladatum->validatetrans, fp);
2912 if (rc)
2913 return rc;
2914
2915 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
2916 buf[0] = cpu_to_le32(cladatum->default_user);
2917 buf[1] = cpu_to_le32(cladatum->default_role);
2918 buf[2] = cpu_to_le32(cladatum->default_range);
2919
2920 rc = put_entry(buf, sizeof(uint32_t), 3, fp);
2921 if (rc)
2922 return rc;
2923 }
2924
2925 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
2926 buf[0] = cpu_to_le32(cladatum->default_type);
2927 rc = put_entry(buf, sizeof(uint32_t), 1, fp);
2928 if (rc)
2929 return rc;
2930 }
2931
2932 return 0;
2933}
2934
2935static int role_write(void *vkey, void *datum, void *ptr)
2936{
2937 char *key = vkey;
2938 struct role_datum *role = datum;
2939 struct policy_data *pd = ptr;
2940 void *fp = pd->fp;
2941 struct policydb *p = pd->p;
2942 __le32 buf[3];
2943 size_t items, len;
2944 int rc;
2945
2946 len = strlen(key);
2947 items = 0;
2948 buf[items++] = cpu_to_le32(len);
2949 buf[items++] = cpu_to_le32(role->value);
2950 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
2951 buf[items++] = cpu_to_le32(role->bounds);
2952
2953 BUG_ON(items > ARRAY_SIZE(buf));
2954
2955 rc = put_entry(buf, sizeof(u32), items, fp);
2956 if (rc)
2957 return rc;
2958
2959 rc = put_entry(key, 1, len, fp);
2960 if (rc)
2961 return rc;
2962
2963 rc = ebitmap_write(&role->dominates, fp);
2964 if (rc)
2965 return rc;
2966
2967 rc = ebitmap_write(&role->types, fp);
2968 if (rc)
2969 return rc;
2970
2971 return 0;
2972}
2973
2974static int type_write(void *vkey, void *datum, void *ptr)
2975{
2976 char *key = vkey;
2977 struct type_datum *typdatum = datum;
2978 struct policy_data *pd = ptr;
2979 struct policydb *p = pd->p;
2980 void *fp = pd->fp;
2981 __le32 buf[4];
2982 int rc;
2983 size_t items, len;
2984
2985 len = strlen(key);
2986 items = 0;
2987 buf[items++] = cpu_to_le32(len);
2988 buf[items++] = cpu_to_le32(typdatum->value);
2989 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
2990 u32 properties = 0;
2991
2992 if (typdatum->primary)
2993 properties |= TYPEDATUM_PROPERTY_PRIMARY;
2994
2995 if (typdatum->attribute)
2996 properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
2997
2998 buf[items++] = cpu_to_le32(properties);
2999 buf[items++] = cpu_to_le32(typdatum->bounds);
3000 } else {
3001 buf[items++] = cpu_to_le32(typdatum->primary);
3002 }
3003 BUG_ON(items > ARRAY_SIZE(buf));
3004 rc = put_entry(buf, sizeof(u32), items, fp);
3005 if (rc)
3006 return rc;
3007
3008 rc = put_entry(key, 1, len, fp);
3009 if (rc)
3010 return rc;
3011
3012 return 0;
3013}
3014
3015static int user_write(void *vkey, void *datum, void *ptr)
3016{
3017 char *key = vkey;
3018 struct user_datum *usrdatum = datum;
3019 struct policy_data *pd = ptr;
3020 struct policydb *p = pd->p;
3021 void *fp = pd->fp;
3022 __le32 buf[3];
3023 size_t items, len;
3024 int rc;
3025
3026 len = strlen(key);
3027 items = 0;
3028 buf[items++] = cpu_to_le32(len);
3029 buf[items++] = cpu_to_le32(usrdatum->value);
3030 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3031 buf[items++] = cpu_to_le32(usrdatum->bounds);
3032 BUG_ON(items > ARRAY_SIZE(buf));
3033 rc = put_entry(buf, sizeof(u32), items, fp);
3034 if (rc)
3035 return rc;
3036
3037 rc = put_entry(key, 1, len, fp);
3038 if (rc)
3039 return rc;
3040
3041 rc = ebitmap_write(&usrdatum->roles, fp);
3042 if (rc)
3043 return rc;
3044
3045 rc = mls_write_range_helper(&usrdatum->range, fp);
3046 if (rc)
3047 return rc;
3048
3049 rc = mls_write_level(&usrdatum->dfltlevel, fp);
3050 if (rc)
3051 return rc;
3052
3053 return 0;
3054}
3055
3056static int (*write_f[SYM_NUM]) (void *key, void *datum,
3057 void *datap) =
3058{
3059 common_write,
3060 class_write,
3061 role_write,
3062 type_write,
3063 user_write,
3064 cond_write_bool,
3065 sens_write,
3066 cat_write,
3067};
3068
3069static int ocontext_write(struct policydb *p, struct policydb_compat_info *info,
3070 void *fp)
3071{
3072 unsigned int i, j, rc;
3073 size_t nel, len;
3074 __be64 prefixbuf[1];
3075 __le32 buf[3];
3076 u32 nodebuf[8];
3077 struct ocontext *c;
3078 for (i = 0; i < info->ocon_num; i++) {
3079 nel = 0;
3080 for (c = p->ocontexts[i]; c; c = c->next)
3081 nel++;
3082 buf[0] = cpu_to_le32(nel);
3083 rc = put_entry(buf, sizeof(u32), 1, fp);
3084 if (rc)
3085 return rc;
3086 for (c = p->ocontexts[i]; c; c = c->next) {
3087 switch (i) {
3088 case OCON_ISID:
3089 buf[0] = cpu_to_le32(c->sid[0]);
3090 rc = put_entry(buf, sizeof(u32), 1, fp);
3091 if (rc)
3092 return rc;
3093 rc = context_write(p, &c->context[0], fp);
3094 if (rc)
3095 return rc;
3096 break;
3097 case OCON_FS:
3098 case OCON_NETIF:
3099 len = strlen(c->u.name);
3100 buf[0] = cpu_to_le32(len);
3101 rc = put_entry(buf, sizeof(u32), 1, fp);
3102 if (rc)
3103 return rc;
3104 rc = put_entry(c->u.name, 1, len, fp);
3105 if (rc)
3106 return rc;
3107 rc = context_write(p, &c->context[0], fp);
3108 if (rc)
3109 return rc;
3110 rc = context_write(p, &c->context[1], fp);
3111 if (rc)
3112 return rc;
3113 break;
3114 case OCON_PORT:
3115 buf[0] = cpu_to_le32(c->u.port.protocol);
3116 buf[1] = cpu_to_le32(c->u.port.low_port);
3117 buf[2] = cpu_to_le32(c->u.port.high_port);
3118 rc = put_entry(buf, sizeof(u32), 3, fp);
3119 if (rc)
3120 return rc;
3121 rc = context_write(p, &c->context[0], fp);
3122 if (rc)
3123 return rc;
3124 break;
3125 case OCON_NODE:
3126 nodebuf[0] = c->u.node.addr;
3127 nodebuf[1] = c->u.node.mask;
3128 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3129 if (rc)
3130 return rc;
3131 rc = context_write(p, &c->context[0], fp);
3132 if (rc)
3133 return rc;
3134 break;
3135 case OCON_FSUSE:
3136 buf[0] = cpu_to_le32(c->v.behavior);
3137 len = strlen(c->u.name);
3138 buf[1] = cpu_to_le32(len);
3139 rc = put_entry(buf, sizeof(u32), 2, fp);
3140 if (rc)
3141 return rc;
3142 rc = put_entry(c->u.name, 1, len, fp);
3143 if (rc)
3144 return rc;
3145 rc = context_write(p, &c->context[0], fp);
3146 if (rc)
3147 return rc;
3148 break;
3149 case OCON_NODE6:
3150 for (j = 0; j < 4; j++)
3151 nodebuf[j] = c->u.node6.addr[j];
3152 for (j = 0; j < 4; j++)
3153 nodebuf[j + 4] = c->u.node6.mask[j];
3154 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3155 if (rc)
3156 return rc;
3157 rc = context_write(p, &c->context[0], fp);
3158 if (rc)
3159 return rc;
3160 break;
3161 case OCON_IBPKEY:
3162
3163 prefixbuf[0] = cpu_to_be64(c->u.ibpkey.subnet_prefix);
3164
3165 rc = put_entry(prefixbuf, sizeof(u64), 1, fp);
3166 if (rc)
3167 return rc;
3168
3169 buf[0] = cpu_to_le32(c->u.ibpkey.low_pkey);
3170 buf[1] = cpu_to_le32(c->u.ibpkey.high_pkey);
3171
3172 rc = put_entry(buf, sizeof(u32), 2, fp);
3173 if (rc)
3174 return rc;
3175 rc = context_write(p, &c->context[0], fp);
3176 if (rc)
3177 return rc;
3178 break;
3179 case OCON_IBENDPORT:
3180 len = strlen(c->u.ibendport.dev_name);
3181 buf[0] = cpu_to_le32(len);
3182 buf[1] = cpu_to_le32(c->u.ibendport.port);
3183 rc = put_entry(buf, sizeof(u32), 2, fp);
3184 if (rc)
3185 return rc;
3186 rc = put_entry(c->u.ibendport.dev_name, 1, len, fp);
3187 if (rc)
3188 return rc;
3189 rc = context_write(p, &c->context[0], fp);
3190 if (rc)
3191 return rc;
3192 break;
3193 }
3194 }
3195 }
3196 return 0;
3197}
3198
3199static int genfs_write(struct policydb *p, void *fp)
3200{
3201 struct genfs *genfs;
3202 struct ocontext *c;
3203 size_t len;
3204 __le32 buf[1];
3205 int rc;
3206
3207 len = 0;
3208 for (genfs = p->genfs; genfs; genfs = genfs->next)
3209 len++;
3210 buf[0] = cpu_to_le32(len);
3211 rc = put_entry(buf, sizeof(u32), 1, fp);
3212 if (rc)
3213 return rc;
3214 for (genfs = p->genfs; genfs; genfs = genfs->next) {
3215 len = strlen(genfs->fstype);
3216 buf[0] = cpu_to_le32(len);
3217 rc = put_entry(buf, sizeof(u32), 1, fp);
3218 if (rc)
3219 return rc;
3220 rc = put_entry(genfs->fstype, 1, len, fp);
3221 if (rc)
3222 return rc;
3223 len = 0;
3224 for (c = genfs->head; c; c = c->next)
3225 len++;
3226 buf[0] = cpu_to_le32(len);
3227 rc = put_entry(buf, sizeof(u32), 1, fp);
3228 if (rc)
3229 return rc;
3230 for (c = genfs->head; c; c = c->next) {
3231 len = strlen(c->u.name);
3232 buf[0] = cpu_to_le32(len);
3233 rc = put_entry(buf, sizeof(u32), 1, fp);
3234 if (rc)
3235 return rc;
3236 rc = put_entry(c->u.name, 1, len, fp);
3237 if (rc)
3238 return rc;
3239 buf[0] = cpu_to_le32(c->v.sclass);
3240 rc = put_entry(buf, sizeof(u32), 1, fp);
3241 if (rc)
3242 return rc;
3243 rc = context_write(p, &c->context[0], fp);
3244 if (rc)
3245 return rc;
3246 }
3247 }
3248 return 0;
3249}
3250
3251static int hashtab_cnt(void *key, void *data, void *ptr)
3252{
3253 int *cnt = ptr;
3254 *cnt = *cnt + 1;
3255
3256 return 0;
3257}
3258
3259static int range_write_helper(void *key, void *data, void *ptr)
3260{
3261 __le32 buf[2];
3262 struct range_trans *rt = key;
3263 struct mls_range *r = data;
3264 struct policy_data *pd = ptr;
3265 void *fp = pd->fp;
3266 struct policydb *p = pd->p;
3267 int rc;
3268
3269 buf[0] = cpu_to_le32(rt->source_type);
3270 buf[1] = cpu_to_le32(rt->target_type);
3271 rc = put_entry(buf, sizeof(u32), 2, fp);
3272 if (rc)
3273 return rc;
3274 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3275 buf[0] = cpu_to_le32(rt->target_class);
3276 rc = put_entry(buf, sizeof(u32), 1, fp);
3277 if (rc)
3278 return rc;
3279 }
3280 rc = mls_write_range_helper(r, fp);
3281 if (rc)
3282 return rc;
3283
3284 return 0;
3285}
3286
3287static int range_write(struct policydb *p, void *fp)
3288{
3289 __le32 buf[1];
3290 int rc, nel;
3291 struct policy_data pd;
3292
3293 pd.p = p;
3294 pd.fp = fp;
3295
3296
3297 nel = 0;
3298 rc = hashtab_map(p->range_tr, hashtab_cnt, &nel);
3299 if (rc)
3300 return rc;
3301
3302 buf[0] = cpu_to_le32(nel);
3303 rc = put_entry(buf, sizeof(u32), 1, fp);
3304 if (rc)
3305 return rc;
3306
3307
3308 rc = hashtab_map(p->range_tr, range_write_helper, &pd);
3309 if (rc)
3310 return rc;
3311
3312 return 0;
3313}
3314
3315static int filename_write_helper(void *key, void *data, void *ptr)
3316{
3317 __le32 buf[4];
3318 struct filename_trans *ft = key;
3319 struct filename_trans_datum *otype = data;
3320 void *fp = ptr;
3321 int rc;
3322 u32 len;
3323
3324 len = strlen(ft->name);
3325 buf[0] = cpu_to_le32(len);
3326 rc = put_entry(buf, sizeof(u32), 1, fp);
3327 if (rc)
3328 return rc;
3329
3330 rc = put_entry(ft->name, sizeof(char), len, fp);
3331 if (rc)
3332 return rc;
3333
3334 buf[0] = cpu_to_le32(ft->stype);
3335 buf[1] = cpu_to_le32(ft->ttype);
3336 buf[2] = cpu_to_le32(ft->tclass);
3337 buf[3] = cpu_to_le32(otype->otype);
3338
3339 rc = put_entry(buf, sizeof(u32), 4, fp);
3340 if (rc)
3341 return rc;
3342
3343 return 0;
3344}
3345
3346static int filename_trans_write(struct policydb *p, void *fp)
3347{
3348 u32 nel;
3349 __le32 buf[1];
3350 int rc;
3351
3352 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
3353 return 0;
3354
3355 nel = 0;
3356 rc = hashtab_map(p->filename_trans, hashtab_cnt, &nel);
3357 if (rc)
3358 return rc;
3359
3360 buf[0] = cpu_to_le32(nel);
3361 rc = put_entry(buf, sizeof(u32), 1, fp);
3362 if (rc)
3363 return rc;
3364
3365 rc = hashtab_map(p->filename_trans, filename_write_helper, fp);
3366 if (rc)
3367 return rc;
3368
3369 return 0;
3370}
3371
3372
3373
3374
3375
3376
3377int policydb_write(struct policydb *p, void *fp)
3378{
3379 unsigned int i, num_syms;
3380 int rc;
3381 __le32 buf[4];
3382 u32 config;
3383 size_t len;
3384 struct policydb_compat_info *info;
3385
3386
3387
3388
3389
3390
3391
3392 if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3393 pr_err("SELinux: refusing to write policy version %d."
3394 " Because it is less than version %d\n", p->policyvers,
3395 POLICYDB_VERSION_AVTAB);
3396 return -EINVAL;
3397 }
3398
3399 config = 0;
3400 if (p->mls_enabled)
3401 config |= POLICYDB_CONFIG_MLS;
3402
3403 if (p->reject_unknown)
3404 config |= REJECT_UNKNOWN;
3405 if (p->allow_unknown)
3406 config |= ALLOW_UNKNOWN;
3407
3408
3409 buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3410 len = strlen(POLICYDB_STRING);
3411 buf[1] = cpu_to_le32(len);
3412 rc = put_entry(buf, sizeof(u32), 2, fp);
3413 if (rc)
3414 return rc;
3415 rc = put_entry(POLICYDB_STRING, 1, len, fp);
3416 if (rc)
3417 return rc;
3418
3419
3420 info = policydb_lookup_compat(p->policyvers);
3421 if (!info) {
3422 pr_err("SELinux: compatibility lookup failed for policy "
3423 "version %d", p->policyvers);
3424 return -EINVAL;
3425 }
3426
3427 buf[0] = cpu_to_le32(p->policyvers);
3428 buf[1] = cpu_to_le32(config);
3429 buf[2] = cpu_to_le32(info->sym_num);
3430 buf[3] = cpu_to_le32(info->ocon_num);
3431
3432 rc = put_entry(buf, sizeof(u32), 4, fp);
3433 if (rc)
3434 return rc;
3435
3436 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3437 rc = ebitmap_write(&p->policycaps, fp);
3438 if (rc)
3439 return rc;
3440 }
3441
3442 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3443 rc = ebitmap_write(&p->permissive_map, fp);
3444 if (rc)
3445 return rc;
3446 }
3447
3448 num_syms = info->sym_num;
3449 for (i = 0; i < num_syms; i++) {
3450 struct policy_data pd;
3451
3452 pd.fp = fp;
3453 pd.p = p;
3454
3455 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3456 buf[1] = cpu_to_le32(p->symtab[i].table->nel);
3457
3458 rc = put_entry(buf, sizeof(u32), 2, fp);
3459 if (rc)
3460 return rc;
3461 rc = hashtab_map(p->symtab[i].table, write_f[i], &pd);
3462 if (rc)
3463 return rc;
3464 }
3465
3466 rc = avtab_write(p, &p->te_avtab, fp);
3467 if (rc)
3468 return rc;
3469
3470 rc = cond_write_list(p, p->cond_list, fp);
3471 if (rc)
3472 return rc;
3473
3474 rc = role_trans_write(p, fp);
3475 if (rc)
3476 return rc;
3477
3478 rc = role_allow_write(p->role_allow, fp);
3479 if (rc)
3480 return rc;
3481
3482 rc = filename_trans_write(p, fp);
3483 if (rc)
3484 return rc;
3485
3486 rc = ocontext_write(p, info, fp);
3487 if (rc)
3488 return rc;
3489
3490 rc = genfs_write(p, fp);
3491 if (rc)
3492 return rc;
3493
3494 rc = range_write(p, fp);
3495 if (rc)
3496 return rc;
3497
3498 for (i = 0; i < p->p_types.nprim; i++) {
3499 struct ebitmap *e = &p->type_attr_map_array[i];
3500
3501 rc = ebitmap_write(e, fp);
3502 if (rc)
3503 return rc;
3504 }
3505
3506 return 0;
3507}
3508